Rainwater drainage system and building

Abstract

To provide a rainwater drainage system capable of easily cleaning garbage clogged inside downstream of an eaves gutter.SOLUTION: There is provided a rainwater drainage system for draining rainwater from a building 200, including: a drain member provided at an inlet opening through which rainwater flows in; a joint 30 and a vertical pipe provided downstream of the drain member. The joint 30 is located downstream of the drain member and has a connecting pipe 35 which serves as a flow path for rainwater; an extension pipe 36 which protrudes outward from the connecting pipe 35; and a cleaning port 36a formed at the end of the extension pipe 36.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a storm water drainage system and a building. [Background technology]

[0002] Conventionally, a gutter system is known that includes an eaves gutter, a pair of elbows, a lower gutter, and a downspout (see, for example, Patent Document 1). A water collection port is formed at the bottom of the eaves gutter. A siphon generating unit is provided at the water collection port to generate a siphon effect in the gutter system. The siphon generating unit includes a net disposed above the water collection port, and a number of vertical ribs connected to the net. In the siphoning area, an effect similar to the Venturi effect is exerted, making it easier for a full-flow state to occur, which allows the siphoning phenomenon to occur effectively. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-120068 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the gutter system of Patent Document 1, debris such as fallen leaves may get into the gutter system downstream of the eaves gutter through gaps between the vertical ribs. In this case, since the upper part of the water collection opening is covered with a net and the vertical ribs, it becomes difficult to clean the debris that has gotten into the inside of the gutter system from above the water collection opening.

[0005] The present invention has been made in consideration of such problems, and aims to provide a rainwater drainage system and a building that can easily clean out debris that has accumulated inside downstream of the eaves gutter. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention proposes the following means. The gutter system of the present invention is a gutter system comprising an eaves gutter, a downspout, a plurality of joints connected between the eaves gutter and the downspout or provided on the downspout, and a siphon generating unit for generating a siphon effect, wherein at least one of the plurality of joints has a joint body having a cleaning port formed therein, and a cover body removably attached to the cleaning port.

[0007] According to this invention, since the gutter system includes a siphon generating section, a siphon phenomenon occurs in the gutter system, and a large amount of rainwater can flow into the eaves gutter, the multiple joints, and the downpipe. At least one of the multiple joints includes a joint body and a lid. Therefore, for example, the lid is removed from the cleaning port of the joint body. In this state, cleaning tools or the like can be inserted into the joint body through the cleaning port, and debris that has accumulated inside the joint body and the downpipe downstream of the eaves gutter can be easily cleaned.

[0008] In addition, in the gutter system, the opening area of ​​the joint body is 30 cm 2 It may be more than that. The opening area referred to here means the cross-sectional area of ​​the internal space of the joint body in a plane perpendicular to the axis of the joint body. According to this invention, the fitting body has a relatively large opening area, so that, for example, even if the gutter system is used in a non-residential building with a large roof area, rainwater that flows into the fitting body from the first end of the fitting body can flow out from the second end of the fitting body without stagnating within the fitting body.

[0009] In the gutter system, the joint body may be curved. According to the present invention, the flow paths of the gutter system can be connected by a curved joint body.

[0010] In the gutter system, the joint body may be bent. According to the present invention, the flow paths of the gutter system can be connected by a bent joint body.

[0011] Further, in the gutter system, the cover body has an insertion portion inserted into the cleaning port and a flange portion provided at one end of the insertion portion and removably attached to the cleaning port, the fitting body has a connecting pipe having at least one end connected to at least one of the eaves gutter, the siphon generating portion, and the downspout, and an extension pipe protruding outward from the connecting pipe, the cleaning port is formed in the extension pipe, and the insertion portion blocks at least a portion of the internal space of the extension pipe, and may not block the internal space of the connecting pipe. According to this invention, when the insertion part is inserted into the cleaning port and the flange part is attached to the cleaning port, the insertion part does not block the internal space of the connecting pipe. This makes it possible to prevent the flow of rainwater that flows into the connecting pipe from the first end part of the connecting pipe from being blocked by the insertion part. In addition, since the insertion part blocks at least a part of the internal space of the extension pipe, it is possible to prevent the rainwater from flowing in a place other than the internal space of the connecting pipe, causing the rainwater to swirl or become turbulent in that part, which would hinder the siphoning of the rainwater. On the other hand, when the cover is removed from the cleaning port of the extension pipe, the inside of the joint body, etc. can be cleaned through the cleaning port with a cleaning tool, etc.

[0012] The gutter system may also include a lower gutter having a first end connected to the eaves gutter via one of the multiple joints and a second end connected to the downspout via another one of the multiple joints. According to the present invention, one of the plurality of joints can be connected to another one by a call pipe. Effect of the Invention

[0013] According to the rainwater drainage system and building of the present invention, garbage that has accumulated inside downstream of the eaves gutter can be easily cleaned. [Brief description of the drawings]

[0014] [Figure 1] 1 is a partially cutaway front view of a gutter system according to a first embodiment of the present invention. FIG. [Diagram 2] FIG. 2 is a partially cutaway perspective view of a siphon generating portion of the gutter system. [Diagram 3] 4 is a cross-sectional view of the first joint of the gutter system when a cover is attached to the joint body. FIG. [Figure 4] 4 is a cross-sectional view of the first joint of the gutter system with the cover body removed from the joint body. FIG. [Diagram 5] FIG. 4 is a cross-sectional view of a first joint in a first modified example of the first embodiment of the present invention. [Figure 6] FIG. 2 is a partially cutaway front view of a gutter system according to a first modified example of the first embodiment of the present invention. [Figure 7] FIG. 11 is a partially cutaway front view of a gutter system according to a second modified example of the first embodiment of the present invention. [Figure 8] FIG. 11 is a partially cutaway front view of a gutter system according to a third modified example of the first embodiment of the present invention. [Figure 9] FIG. 5 is a partially cutaway front view of a gutter system according to a second embodiment of the present invention. [Figure 10] FIG. 4 is a cross-sectional view of a first joint in the gutter system. [Figure 11] FIG. 11 is a partially cutaway front view of a gutter system in a first modified example of the second embodiment of the present invention. [Figure 12] FIG. 11 is a partially cutaway front view of a gutter system in a second modified example of the second embodiment of the present invention. [Figure 13] FIG. 11 is a perspective view of a gutter system according to a third embodiment of the present invention. [Figure 14] FIG. 2 is a partially cutaway, partially simplified front view of the gutter system. [Figure 15] FIG. 13 is a partially cutaway, partially simplified front view of a gutter system according to a first modified example of the third embodiment of the present invention. [Figure 16] FIG. 11 is a perspective view of a main part of a gutter system according to a fourth embodiment of the present invention. [Figure 17] FIG. 2 is an exploded cross-sectional view of a joint in the gutter system. [Figure 18] FIG. 2 is a perspective view of a cover body of the rain gutter system. [Figure 19] FIG. 11 is a partially cutaway perspective view of a siphon generating portion in a modified embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] (First embodiment) Hereinafter, a first embodiment of a gutter system according to the present invention will be described with reference to Figs. As shown in Fig. 1, the gutter system 1 of this embodiment is used in a building 200. The gutter system 1 includes an eaves gutter 10, a siphon generating unit 15, a first joint (joint) 30, a nominal gutter 50, a second joint (joint) 55, and a downspout 60.

[0016] The eaves gutter 10 is fixed substantially horizontally to the eaves of a roof 201 of a building 200. The building 200 is, for example, a non-residential building having a large roof area, such as a factory or a station building. The eaves gutter 10 opens upward and extends in the D1 direction. In a cross-sectional view perpendicular to the D1 direction, the eaves gutter 10 has a bottom 10b and side walls 10s, 10s rising upward from both sides in the width direction of the bottom 10b (the D2 direction in FIG. 1). The D1 direction and the D2 direction are both directions along a horizontal plane. It is preferable that the eaves gutter 10 ensures a sufficient flow rate to drain rainwater flowing in from the large-area roof 201 of the building 200. For this reason, the width (length in the D2 direction) of the bottom 10b is preferably at least 100 mm or more. The width of the bottom 10b is more preferably 120 mm or more, and even more preferably 150 mm or more. There is no particular upper limit to the width of the bottom 10b, but the width of the bottom 10b is preferably 300 mm or less.

[0017] A water collection port 12 penetrating the bottom 10b is formed at a predetermined position in the D1 direction (longitudinal direction) of the bottom 10b. In the D1 direction, the upper surface of the bottom 10b (i.e., the inner surface of the eaves gutter 10) descends slightly toward the water collection port 12. The lower surface of the bottom 10b may be formed approximately horizontal, and only the upper surface of the bottom 10b may descend toward the water collection port 12. The thickness of the bottom 10b may be approximately constant, and the bottom 10b itself may descend toward the water collection port 12. The eaves gutter 10 is fixed to the tip of the roof 201 by a known hanging device 201a.

[0018] The water collection port 12 is provided with a siphon generating section 15, which is a drain member, for generating a siphon phenomenon in the gutter system 1 (the eaves gutter 10, the joints 30, 55, the downpipe 50, and the downpipe 60). As shown in FIG. 2, the siphon generating unit 15 has a generating unit main body 13 and a lower cylinder 14. The generation unit main body 13 comprises a plate-shaped cover member 16, an attachment tube 17 having a drop opening portion 21 and connected to the first joint 30, and a plurality of vertical ribs 18 that connect the cover member 16 and the attachment tube 17 and are arranged circumferentially spaced apart in positions that do not overlap the drop opening portion 21 when viewed from above. In this embodiment, the generating unit body 13 is an injection molded product made of synthetic resin such as hard polyvinyl chloride resin, polycarbonate, ABS, AES, polyethylene, polypropylene, etc. Note that the generating unit body 13 is not limited to being made of synthetic resin, and may be made of cast iron using a mold.

[0019] In this embodiment, the cover member 16 is formed in a disk shape, and the mounting tube 17 is formed in a cylindrical shape, and their respective central axes are arranged on a common axis and coincide with the vertical direction. Hereinafter, this common axis is referred to as the drain axis O1. The mounting tube 17 side of the generation unit main body 13 along the drain axis O1 direction is referred to as the lower side, and the cover member 16 side is referred to as the upper side. In a plan view of the generation unit main body 13 seen from the drain axis O1 direction, the direction perpendicular to the drain axis O1 is referred to as the radial direction, and the direction going around the drain axis O1 is referred to as the circumferential direction.

[0020] The mounting tube 17 has a tube portion 17A that forms the drop opening 21, and a plate-shaped flange portion 17B that extends radially outward from the upper end of the tube portion 17A. Here, the opening outer diameter R1 of the drop opening 21 corresponds to the inner diameter of the tube portion 17A. The opening area A1 of the drop opening 21 corresponds to the area obtained by dividing the inner diameter of the tube portion 17A (the opening outer diameter R1 of the drop opening 21) by the diameter. In this embodiment, the opening area A1 is 20 cm 2 More than 300cm 2 The opening area A1 is 30 cm 2 over 190cm 2 Less than 40cm is preferable 2 More than 100cm 2 The following is more preferred: In this embodiment, the drain axis O1, which corresponds to the central axis of the generating body 13, coincides with the vertical direction.

[0021] An external thread portion 17e is formed on the outer circumferential surface of the cylindrical portion 17A. The external thread portion 17e is provided continuously over the entire circumference in the circumferential direction. In the mounting tube 17, the inner connection part 17a where the tube part 17A corresponding to the drop opening 21 and the flange part 17B are connected has a tapered surface or a curved bell-mouth shape. If the inner connection part 17a is a curved surface, the radius of curvature of the cross section in the direction parallel to the drain axis O1 is preferably 5 mm to 20 mm. The tubular portion 17A is disposed in a state in which it is inserted through the water collection port 12 of the eaves gutter 10 from above and connected to the first joint 30.

[0022] The flange 17B has a step 17b that is cut out thinly over the entire circumference on the lower surface of the outer periphery. This step 17b is engaged with the bottom 10b of the eaves gutter 10. In this embodiment, the flange 17B and the cover member 16 have approximately the same outer diameter. The portion formed between the outer peripheral edge 16a of the cover member 16 and the outer peripheral edge 17c of the flange portion 17B serves as an inflow opening 15A through which rainwater accumulated in the eaves gutter 10 flows into the opening of the drop opening portion 21.

[0023] The vertical ribs 18 connect the upper surface 17d of the flange 17B of the mounting tube 17 to the outer periphery of the lower surface 16c of the cover member 16. That is, the cover member 16 is supported from below by the vertical ribs 18, 18, ... and is held at a position that ensures a predetermined height H from the bottom 10b of the eaves gutter 10. These vertical ribs 18 are provided on the inlet opening 15A, and are formed to cross the radial direction in a plan view and curved. That is, the vertical ribs 18 have the function of rectifying the rainwater that flows from the inlet opening 15A to the drop opening 21.

[0024] As described above, the cover member 16 is supported by the mounting tube 17 while being supported from below by the multiple vertical ribs 18, 18, .... As described above, the cover member 16 is disposed inside the eaves gutter 10. The cover member 16 is installed at a position spaced above the drop opening 21, and forms an inflow opening 15A at the bottom 10b of the eaves gutter 10 below the cover member 16, through which rainwater flows into the drop opening 21.

[0025] The cover member 16 is also provided with gripping ribs 23 which protrude upward from the upper surface 16b and are spaced apart in the circumferential direction. By gripping these gripping ribs 23, the rotation operation for tightening the siphon generator 15 can be easily performed. The gripping rib 23 is composed of a rib main body 23A extending in the circumferential direction and extensions 23B protruding from both ends of the rib main body 23A toward the outer periphery. For example, when connecting the siphon generator 15 to the first joint 30, a rod-shaped member can be engaged between the gripping ribs 23, 23 adjacent in the circumferential direction and then rotated to tighten the siphon generator 15.

[0026] Furthermore, the cover member 16 is provided with a plurality of guides 24, each having a curved line that gradually extends downward toward the drain axis O1 at the center of the lower surface 16c in a plan view, extending radially from the drain axis O1 in a radial direction. The guides 24 are intended to guide rainwater in the eaves gutter 10 from the inlet opening 15A to the drop opening (the opening of the drop opening portion 21).

[0027] The lower cylinder 14 has an outer cylinder portion 26 and a fixing portion 27 . The outer tubular portion 26 has a cylindrical shape and is disposed coaxially with the drain axis O1 below the bottom portion 10b of the eaves gutter 10. The outer tubular portion 26 includes a large diameter portion 26A and a small diameter portion 26B. The large diameter portion 26A forms the upper end of the outer tubular portion 26. The upper end of the large diameter portion 26A gradually expands in diameter from the bottom to the top. In the illustrated example, the upper end of the large diameter portion 26A has a bell-mouth shape formed into a curved surface. The small diameter portion 26B has a smaller diameter than the large diameter portion 26A. A female screw portion 26C is formed on the inner peripheral surface of the small diameter portion 26B. The female screw portion 26C is intermittently provided over the entire circumference in the circumferential direction. The small diameter portion 26B is connected to the lower end of the large diameter portion 26A. The length of the large diameter portion 26A in the drain axis O1 direction is shorter than the length of the small diameter portion 26B in the drain axis O1 direction.

[0028] The fixing portion 27 extends radially outward from the upper end portion of the outer cylindrical portion 26 (large diameter portion 26A). The lower cylinder 14 is formed in the same manner as the generating unit main body 13 . The tubular portion 17A of the generation unit main body 13 is disposed within the outer tubular portion 26 of the lower cylinder 14. The female threaded portion 26C of the outer tubular portion 26 and the male threaded portion 17e of the tubular portion 17A are fitted together. The bottom portion 10b of the eaves gutter 10 is sandwiched in the direction of the drain axis O1 between the fixing portion 27 of the lower cylinder 14 and the flange portion 17B of the generation unit main body 13. At this time, the fixing portion 27 is fixed to the lower surface of the bottom portion 10b with an adhesive or the like.

[0029] As shown in Fig. 3, the first joint 30 is a joint in which a cleaning port is formed in a so-called 90° elbow (hereinafter, also referred to as a joint with a cleaning port). Fig. 3 is a cross-sectional view taken along a plane including the axis of a curved pipe portion 35 of the first joint 30 (hereinafter, referred to as a reference plane). The first joint 30 includes a joint body 31 and a cover body 32 . The joint body 31 includes a curved pipe portion (connecting pipe) , an extension pipe , a first connection portion (connecting portion) 37, and a second connection portion (connecting portion) . The curved pipe portion 35 is formed in a tubular shape curved so that the central angle is about 90°. That is, the curved pipe portion 35 (joint body 31) is curved. It is preferable that the inner diameter of the curved pipe portion 35 is constant regardless of the position in the axial direction of the curved pipe portion 35. The inner diameter of the curved pipe portion 35 is appropriately set to, for example, 77.55 mm.

[0030] The first connecting portion 37 and the second connecting portion 38 are sockets, each formed in a cylindrical shape. The first connecting portion 37 is fixed to a first end of the curved pipe portion 35. The inner diameter of the first connecting portion 37 is larger than the inner diameter of the curved pipe portion 35. The second connecting portion 38 is fixed to a second end of the curved pipe portion 35 opposite to the first end. The inner diameter of the second connecting portion 38 is equal to the inner diameter of the first connecting portion 37. The first connecting portion 37 and the second connecting portion 38 are rotated by 90°. The inner diameter of the connecting portions 37 and 38 is preferably 52 mm or more and 155 mm or less, with 88.65 mm as an example. The inner diameter of the connecting portions 37 and 38 is more preferably 75 mm or more and 110 mm or less.

[0031] The extension pipe 36 is formed in a straight pipe shape. The extension pipe 36 protrudes from the curved pipe portion 35 toward the outside of the curved pipe portion 35 on the cross section shown in FIG. 3. More specifically, the extension pipe 36 extends from the second end of the curved pipe portion 35 toward the opposite side to the second connection portion 38 along the tangential direction at the second end of the curved pipe portion 35. In this embodiment, a cleaning port 36a is formed at the tip end from which the extension pipe 36 extends. That is, the cleaning port 36a is formed in the joint body 31. The extension tube 36 is preferably formed with a first engagement portion such as a groove. The internal space of the extension pipe 36 is connected to the internal space of the curved pipe portion 35 .

[0032] The opening area of ​​the joint body 31 constructed as above is 30 cm 2 The opening area referred to here means the cross-sectional area of ​​the internal space of the joint body 31 in a plane perpendicular to the axis of the joint body 31.

[0033] The lid body 32 includes an insertion portion 41, a flange portion 42, and a second engagement portion (not shown). The insertion portion 41 is formed in a bottomed tubular shape having a peripheral wall portion 45 and a bottom wall portion 46. The peripheral wall portion 45 is formed in a cylindrical shape. The bottom wall portion 46 is formed in a disk shape and covers an opening formed at a first end portion of the peripheral wall portion 45. The insertion portion 41 is inserted into the extension tube 36 from the cleaning port 36a. The flange portion 42 is formed in a disk shape, and is fixed to a second end portion (one end portion of the insertion portion 41) of the peripheral wall portion 45 of the insertion portion 41. The flange portion 42 protrudes radially outward beyond the insertion portion 41. The outer diameter of the flange portion 42 is equal to or greater than the outer diameter of the extension tube 36. The flange portion 42 is detachably attached to the cleaning port 36a.

[0034] For example, the second engagement portion is a swingable lever provided on the flange portion 42. By swinging the second engagement portion, it is possible to switch between an engaged state in which the second engagement portion engages with the first engagement portion of the extension tube 36 and a disengaged state in which the engagement is released. In this manner, the cover 32 is detachably attached to the cleaning opening 36a. When the second engagement portion is switched to the disengaged state, the cover 32 can be removed from the cleaning opening 36a, as shown in FIG. The second engagement portion is not limited to a lever.

[0035] 3, in this embodiment, a knob 47 is fixed to the flange portion 42. The knob 47 protrudes from the flange portion 42 toward the outside of the first joint 30. The knob 47 is a member for operating the lid body 32. 2, small diameter section 26B of lower tube 14 of siphon generating section 15 is disposed in first connecting section 37 of first joint 30, thereby connecting siphon generating section 15 to first joint 30. A first end of curved pipe section 35 of first joint 30 is connected to siphon generating section 15 via first connecting section 37.

[0036] As shown in Fig. 1, the call pipe 50 is formed in a straight pipe shape and extends along a horizontal plane. The call pipe 50 is preferably arranged so as to have a water gradient. The call pipe 50 is arranged below the eaves ceiling 202 of the building 200. The first joint 30 and the call pipe 50 are connected by arranging a first end of the call pipe 50 in the second connection part 38 of the first joint 30. The first end of the call pipe 50 is connected to the eaves gutter 10 via the siphon generating part 15 and the first joint 30. In this case, the extension pipe 36 of the first joint 30 extends along the horizontal plane. The cover body 32 faces the opposite side to the exterior wall 203 of the building 200, which will be described later. The total length F1 of the auxiliary pipe 50 (the length of the entire auxiliary pipe 50) is greater than 0 m and equal to or less than 2.0 m. The total length F1 of the auxiliary pipe 50 is preferably greater than or equal to 0.6 m and equal to or less than 1.5 m, and more preferably greater than or equal to 0.6 m and equal to or less than 1.0 m. By having the total length F1 within the above range, rainwater flowing down from the first joint 30 flows down smoothly in a full water state.

[0037] In this embodiment, the second joint 55 is a so-called 90° elbow. The second joint 55 includes a curved pipe portion 56, and a first connecting portion 57 and a second connecting portion 58 provided on both ends of the curved pipe portion 56. The second end of the port downpipe 50, opposite to the first end, is disposed within the first connection portion 57 of the second joint 55, thereby connecting the port downpipe 50 and the second joint 55. In this embodiment, the first joint 30 , which is one of the joints 30 and 55 , is an elbow with a cleaning port that includes a joint body 31 and a cover body 32 .

[0038] The downspout 60 is formed in a straight pipe shape and extends along the D3 direction (vertical direction). The downspout 60 is disposed along the outer wall 203 of the building 200. The upper end of the downspout 60 is disposed within the second connection portion 58 of the second joint 55, so that the second joint 55 and the downspout 60 are connected to each other. A second end of the lower pipe 50 is connected to a down pipe 60 via a second joint 55 .

[0039] The lower end of the downspout 60 is connected to the ground G, and is connected to a known water collection basin (drainage mechanism) 206 buried in the ground. The water collection basin 206 is connected to a drainage structure such as a sewer pipe 208 via a connecting pipe 207. The water collection basin 206 has a width greater than that of the downpipe 60. The total length F2 of the downpipe 60 is 2.0 m or more. The total length F2 of the downpipe 60 is preferably 3.0 m or more, and more preferably 4.0 m or more. By keeping the total length F2 within the above-mentioned range, the siphon effect in the downpipe 60 is satisfactorily generated and maintained. The joints 30 and 55 are connected between the eaves gutter 10 and the downspout 60 .

[0040] Each component of the gutter system 1, including the eaves gutter 10, the joints 30, 55, the inner gutter 50, and the downspout 60, is preferably made of a synthetic resin such as polyvinyl chloride resin, polyethylene, or polypropylene, and more preferably made of rigid polyvinyl chloride resin. The joints and gutters made of these synthetic resins may be coated with mortar to impart fire resistance.

[0041] In the gutter system 1 described above, rainwater that falls on the roof 201 of the building 200 flows into the eaves gutter 10. Since the gutter system 1 includes the siphon generating unit 15, a siphon phenomenon occurs in the gutter system 1, and a large amount of rainwater can flow into the eaves gutter 10, the joints 30, 55, and the downpipe 60. In addition, the first joint 30, which is one of the joints 30, 55, includes a joint body 31 and a lid body 32. Therefore, for example, the lid body 32 is removed from the cleaning port 36a of the joint body 31. In this state, cleaning tools or the like can be inserted into the joint body 31 through the cleaning port 36a, and garbage that has accumulated inside the joint body 31 and the downpipe 60 downstream of the eaves gutter 10 can be easily cleaned. In this embodiment, it is particularly easy to clean the inside of the outlet gutter 50 and the second joint 55. Since the lid body 32 is separated from the building 200, the lid body 32 can be easily removed from the joint body 31.

[0042] The opening area of ​​the joint body 31 is 30 cm 2That is all. Since the joint body 31 has a relatively large opening area, for example, even if the rain gutter system 1 is used in a non-residential building having a large roof area, rainwater that flows into the joint body 31 from the first end of the joint body 31 can flow out from the second end of the joint body 31 without stagnating inside the joint body 31. The joint body 31 is curved. Therefore, the flow paths of the rain gutter system 1 can be connected by the curved joint body 31.

[0043] The gutter system 1 includes a call gutter 50. This allows the joints 30 and 55 to be connected by the call gutter 50.

[0044] The configurations of the first joint 30 and the gutter system 1 of this embodiment can be modified in various ways, as described below. 5, the first joint 30 of the first embodiment may be provided with a lid body 66 instead of the lid body 32. The lid body 66 has an insertion portion 67 instead of the insertion portion 41 of the lid body 32. The insertion portion 67 closes at least a portion of the internal space of the extension pipe . The insertion portion 67 does not close the internal space of the curved pipe portion . More specifically, the insertion portion 67 is formed into a cylindrical shape with a bottom, having a peripheral wall portion 68 and a bottom wall portion 69. The peripheral wall portion 68 is formed so as to reduce the gap between the extension tube 36. The outer surface of the bottom wall portion 69 on the opposite side to the peripheral wall portion 68 is formed so as to fit along the inner peripheral surface of the curved tube portion 35.

[0045] In the first joint 65 thus configured, when the insertion portion 67 is inserted into the cleaning port 36a and the flange portion 42 is attached to the cleaning port 36a, the insertion portion 67 does not block the internal space of the curved pipe portion 35. This makes it possible to prevent the flow of rainwater that has flowed into the curved pipe portion 35 from the first end portion (the first connection portion 37 side) of the curved pipe portion 35 from being blocked by the insertion portion 67. In addition, since the insertion portion 67 blocks at least a portion of the internal space of the extension pipe 36, it is possible to prevent the rainwater from flowing in a place other than the internal space of the curved pipe portion 35, causing the rainwater to swirl in that portion, or to be turbulent, thereby preventing the siphoning of the rainwater. On the other hand, when the cover 66 is removed from the cleaning port 36a of the extension pipe 36, the inside of the joint body 31 and the like can be cleaned through the cleaning port 36a with a cleaning tool or the like.

[0046] As in the first modified gutter system 1A shown in Figure 6, in the first embodiment of the gutter system 1, the siphon generator 15 and the second connection part 38 of the first fitting 30 may be connected, and the first connection part 37 of the first fitting 30 and the first end part of the lower gutter 50 may be connected. In the gutter system 1A of the first modification, the extension pipe 36 of the first joint 30 extends vertically. The cover 32 faces downward. In the gutter system 1A of the first modification, the siphon generation part 15 in particular can be easily cleaned from below the siphon generation part 15.

[0047] As in the second modified gutter system 1B shown in Figure 7, in the first embodiment of the gutter system 1, the siphon generator 15 and the nominal gutter 50 may be connected by a second joint 55, and the nominal gutter 50 and the downpipe 60 may be connected by a first joint 30. More specifically, the siphon generating section 15 is connected to the first connection part 57 of the second joint 55, and the second connection part 58 of the second joint 55 is connected to the first end part of the downpipe 50. The second end part of the downpipe 50 is connected to the first connection part 37 of the first joint 30, and the second connection part 38 of the first joint 30 is connected to the upper end part of the downpipe 60. The extension pipe 36 of the first joint 30 extends along the vertical direction. The lid body 32 faces upward. In the gutter system 1B of the second modified example, the downspout 60 can be easily cleaned, particularly from above the downspout 60.

[0048] As in a third modified gutter system 1C shown in Fig. 8, the gutter system 1 of the first embodiment may be provided with a pair of joints 75 instead of the joints 30, 55. In the joint 75, in the first joint 30, an extension pipe 36 extends from the longitudinal center of the curved pipe section 35 in a direction perpendicular to the reference plane. In one of the pair of joints 75, the siphon generating section 15 is connected to a first connection portion 37 of the joint 75, and the second connection portion 38 of the joint 75 is connected to a first end portion of the call pipe 50. In the other of the pair of joints 75, the second end of the call pipe 50 is connected to the second connection part 38 of this joint 75, and the first connection part 37 of this joint 75 is connected to the upper end of the downpipe 60. The extension pipe 36 of the joint 75 extends along the horizontal plane. The cover body 32 faces in a predetermined direction along the horizontal plane. In the gutter system 1C of the third modified example configured in this manner, when the cover 32 is removed from the extension pipe 36, the cover 32 is unlikely to interfere with the building 200. Therefore, the cover 32 can be easily removed from the extension pipe 36.

[0049] Second embodiment Next, a second embodiment of the present invention will be described with reference to Figs. 9 to 12. The same components as those in the above embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in FIG. 9, the gutter system 2 of the present embodiment includes a first joint 80 and a second joint 90 instead of the first joint 30 of the gutter system 1 of the first embodiment. As shown in FIGS. 9 and 10, the first joint 80 includes a joint body 81 instead of the joint body 31 of the first joint 30. 10, the joint body 81 is bent. The joint body 81 includes a bent pipe portion (connecting pipe) 82 instead of the bent pipe portion 35 of the joint body 31. The bent pipe portion 82 includes a first pipe piece 85 and a second pipe piece 86. Each of the pipe segments 85 and 86 is formed in a straight pipe shape. An acute angle θ1 is formed between a central axis O3 of the first pipe segment 85 and a central axis O4 of the second pipe segment 86. For example, the acute angle θ1 is 45°.

[0050] In this state, an end of the first pipe piece 85 and an end of the second pipe piece 86 are joined to each other. The internal space of the first pipe piece 85 is connected to the internal space of the second pipe piece 86. The extension pipe 36 is disposed coaxially with the first pipe section 85. The internal space of the extension pipe 36 is connected to the internal space of the first pipe section 85. The first connecting portion 37 is fixed to an end portion of the first tube piece 85 opposite to the end portion joined to the second tube piece 86. The second connecting portion 38 is fixed to an end portion of the second tube piece 86 opposite to the end portion joined to the first tube piece 85.

[0051] As shown in Fig. 9, the siphon generating section 15 and the first connecting section 37 of the first joint 80 are connected. The second connecting section 38 of the first joint 80 and the first end of the call pipe 50 are connected. In this case, the extension pipe 36 of the first joint 80 extends along the vertical direction. The cover body 32 faces downward. The call pipe 50 is disposed at an angle with respect to the horizontal plane. The second joint 90 is a so-called 45° elbow. The second joint 90 includes a curved pipe portion 91, and a first connecting portion 92 and a second connecting portion 93 provided on both ends of the curved pipe portion 91. A second end of the lower pipe 50 is connected to a first connection portion 92 of the second joint 90. A second connection portion 93 of the second joint 90 is connected to an upper end of the downpipe 60. In the gutter system 2 of the present embodiment, the siphon generation part 15 in particular can be easily cleaned from below the siphon generation part 15.

[0052] According to the gutter system 2 of the present embodiment described above, debris that has accumulated inside the gutter downstream of the eaves gutter 10 can be easily cleaned. Furthermore, by providing the gutter system 2 with the joint body 81, the flow paths of the gutter system 2 can be connected by the bent joint body 81.

[0053] The configurations of the first joint 80 and the gutter system 2 of this embodiment can be modified in various ways, as described below. In the second embodiment of the gutter system 2, as in the first modified example of the gutter system 2A shown in Figure 11, the siphon generator 15 and the nominal gutter 50 may be connected by a second joint 90, and the nominal gutter 50 and the downpipe 60 may be connected by a first joint 80. More specifically, the siphon generating section 15 is connected to a first connection part 92 of the second joint 90, and a second connection part 93 of the second joint 90 is connected to a first end part of the downpipe 50. A second end part of the downpipe 50 is connected to a second connection part 38 of the first joint 80, and a first connection part 37 of the first joint 80 is connected to an upper end part of the downpipe 60. The extension pipe 36 of the first joint 80 extends along the vertical direction. The lid body 32 faces upward. In the gutter system 2A of the first modification, the downspout 60 can be easily cleaned, particularly from above the downspout 60. Also, compared to the gutter system 1B of the second modification, the lid 32 is spaced apart from the eaves ceiling 202. This makes it easier to remove the lid 32 upward from the extension pipe 36 of the first joint 80.

[0054] As in a second modified gutter system 2B shown in FIG. 12, a cover 66 may be provided instead of the cover 32 in the first modified gutter system 2A. The cover 66 and the joint body 81 constitute a first joint 95. The insertion portion 67 of the cover 66 blocks at least a portion of the internal space of the extension pipe 36. The insertion portion 67 does not block the internal space of the bent pipe section 82. The outer surface of the bottom wall section 69 is formed to fit along the inner circumferential surface of the bent pipe section 82. In the gutter system 2B of the second modified example configured in this manner, it is possible to prevent the flow of rainwater that has flowed into the bent pipe section 82 from being obstructed by the insertion section 67. In addition, because the insertion section 67 blocks at least a portion of the internal space of the extension pipe 36, it is possible to prevent the rainwater from flowing in places other than the internal space of the bent pipe section 82, causing the rainwater to swirl in those parts or to become turbulent, thereby preventing the siphoning of the rainwater.

[0055] Third embodiment Next, a third embodiment of the present invention will be described with reference to Figs. 13 to 15. The same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in Fig. 13, the gutter system 3 of the third embodiment is used in a building 215. For example, the building 215 is a factory, shopping center, warehouse, large parking lot, etc., with a height of 20 m or more. A large eaves 216 is fixed to an outer wall 203 of the building 215. The large eaves 216 is disposed below the roof 201. As shown in Figures 13 and 14, the gutter system 3 includes an eaves gutter 10A which is an eaves gutter 10 for the roof 201, and an eaves gutter 10B which is an eaves gutter 10 for the large eaves 216. Note that in Figure 14 and Figure 15 described later, for ease of explanation, the positions and orientations of the eaves gutter 10B, etc. are changed.

[0056] The gutter system 3 uses a joint body 81. A siphon generating unit 15 is connected to the eaves gutter 10B. The upper end of a downpipe 60A is connected to the siphon generating unit 15. The downpipe 60A is configured similarly to the downpipe 60. Downpipes 60B and 60C, which will be described later, are also similar to the downpipe 60A. A lower end of the downpipe 60A is connected to the extension pipe 36 of the joint body 81. A first connection portion 37 of the joint body 81 is connected to an upper end of the downpipe 60B. A siphon generating unit 15 is connected to the eaves gutter 10A. The upper end of a downspout 60C is connected to the siphon generating unit 15. The lower end of the downspout 60C is connected to the second connection unit 38 of the joint body 81 via a second joint 90, a call pipe 50, etc.

[0057] In this embodiment, a downspout 60A is connected to the extension pipe 36 of the joint body 81, instead of the cover body 32. Rainwater that falls on the roof 201 flows into the eaves gutter 10. This rainwater passes through the downspout 60C, the second joint 90, the auxiliary gutter 50, etc., and flows into the joint body 81. Meanwhile, rainwater that falls on the large eaves 216 flows into the eaves gutter 10B. This rainwater passes through the downspout 60A and flows into the joint body 81. In other words, the rainwater that falls on the roof 201 and the large eaves 216 join together at the joint body 81. It is not necessary for the siphon generating unit 15 to be connected to the eaves gutter 10B.

[0058] The configuration of the rain gutter system 3 of this embodiment can be modified as described below. A gutter system 3A of a first modification shown in FIG. 15 is different from the gutter system 3 in the connection form between the siphon generating unit 15 connected to the eaves gutter 10A and the second connection portion 38 of the joint body 81. Specifically, siphon generation unit 15 connected to eaves gutter 10A is connected to second joint 90A, nominal gutter 50A, second joint 90B, downspout 60C, second joint 90C, and nominal gutter 50B. An end of nominal gutter 50B is connected to second connection portion 38 of joint body 81. Second joints 90A, 90B, and 90C are configured similarly to second joint 90. Nominal gutter 50A and 50B are configured similarly to nominal gutter 50. The gutter system 3A of the first modified example can also achieve the same effects as the gutter system 3 of the present embodiment.

[0059] (Fourth embodiment) Next, a fourth embodiment of the present invention will be described with reference to Figs. 16 to 18. The same components as those in the above-mentioned embodiment are given the same reference numerals, and the description thereof will be omitted. Only the differences will be described. As shown in Fig. 16, the gutter system 4 of the present embodiment includes a downspout 100 instead of the downspout 60 of the gutter system 1 of the first embodiment. In Fig. 16, the downspout 100 is indicated by a two-dot chain line. The downpipe 100 is provided with a joint 105. To explain in more detail, the downpipe 100 includes a first downpipe 101 and a second downpipe 102. The downpipes 101 and 102 are each configured similarly to the downpipe 60. An upper end of the first downpipe 101 is connected to the second connection portion 58 of the second joint 55.

[0060] As shown in FIGS. 16 and 17, the joint 105 includes a joint body 106, a cover body 107, and a packing 108. The joint body 106 includes a coupling pipe 111, an extension pipe 112, a first connection portion (connection portion) 113, and a second connection portion (connection portion) 114. The connecting pipe 111 is formed in a straight pipe shape. The first connecting part 113 and the second connecting part 114 are sockets, and each is formed in a cylindrical shape. The first connecting part 113 is fixed to a first end part of the connecting pipe 111. The inner diameter of the first connecting part 113 is larger than the inner diameter of the connecting pipe 111. The second connecting part 114 is fixed to a second end part of the connecting pipe 111, which is opposite to the first end part. The inner diameter of the second connecting part 114 is equal to the inner diameter of the first connecting part 113.

[0061] The extension tube 112 is formed in a straight tube shape. The extension tube 112 protrudes toward the outside of the connecting tube 111. To explain in more detail, the extension tube 112 protrudes from the connecting tube 111 in a direction perpendicular to the central axis O5 of the connecting tube 111. A pipe line 112a formed on the connecting tube 111 side of the extension tube 112 communicates with the internal space of the connecting tube 111. In extension tube 112, an engaged portion 112b having an inner diameter larger than that of pipe 112a is formed on the inner circumferential surface of the tip portion on the side away from connecting tube 111. In engaged portion 112b, a plurality of engaging grooves 117 are formed at intervals in the circumferential direction of extension tube 112.

[0062] As shown in FIGS. 17 and 18, the cover 107 includes an insertion portion 121, an engagement portion 122, and a flange portion 123. As shown in FIG. The insertion portion 121 is formed in a cylindrical shape with a bottom. The insertion portion 121 is inserted into the extension tube 112. The engaging portion 122 is formed at the end of the insertion portion 121 opposite to the bottom wall portion 121a. The engaging portion 122 has a cylindrical shape with a diameter expanded outward from the insertion portion 121. The outer diameter of the engaging portion 122 is larger than the inner diameter of the pipe 112a of the extension tube 112 and smaller than the inner diameter of the engaged portion 112b. On the outer circumferential surface of the engaging portion 122, protrusions 122a are formed at intervals in the circumferential direction, the number of which is the same as the number of engaging grooves 117. Flange portion 123 is formed at the end of engaging portion 122 opposite insertion portion 121, and extends outward from engaging portion 122. The outer diameter of flange portion 123 is larger than the inner diameter of engaged portion 112b. As shown in FIG. 17, the packing 108 is formed into an annular shape and is made of an elastic material such as synthetic resin.

[0063] The lid 107 configured as above is attached to the extension tube 112 as follows. The packing 108 is placed between the lid 107 and the extension tube 112. The insertion portion 121 is inserted into the extension tube 112, and the engagement portion 122 is engaged with the engaged portion 112b of the extension tube 112. To engage the engagement portion 122 with the engaged portion 112b, each protrusion 122a is inserted into the engagement groove 117. Through the above steps, the lid 107 is attached to the extension tube 112.

[0064] The lower end of the first downpipe 101 is connected to the first connection portion 113. The upper end of the second downpipe 102 is connected to the second connection portion 114. The gutter system 4 of the present embodiment described above can also achieve the same effects as the gutter system 1 of the first embodiment. The joint 105 does not necessarily have to include the packing 108. Instead of the first joint 30, a second joint 55 which is a 90° elbow may be used.

[0065] Although the first to fourth embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and the present invention also includes modifications, combinations, deletions, etc. of the configurations within the scope of the gist of the present invention. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. For example, in the first to fourth embodiments, the siphoning section is not particularly limited as long as it can generate a siphoning phenomenon in the gutter system. For example, a siphon generating part 130, which is a vortex current preventing member, as shown in Fig. 19 can be used. The siphon generating part 130 includes an attachment tube 17, a lower tube 14, and a cross plate 131 which are perpendicular to each other. A cutout part 131a having a shape corresponding to the attachment tube 17 is formed in the lower part of the cross plate 131.

[0066] In the first embodiment, the second joint 55 may be a joint with a cleaning port, or both of the joints 30 and 55 may be joints with cleaning ports. At least one end of the connecting pipe of the joint with a cleaning port may be connected to at least one of the eaves gutter, the siphon generating part, and the downpipe. The same applies to the second and third embodiments. The siphon generating portion may be provided in the joints 30, 55, the downpipe 50, and the downpipe 60. The opening area of ​​the joint body 31 is 30 cm 2 The cover 32 may not have the second engagement portion. In this case, the first engagement portion is not formed on the joint body 31. The same applies to the second and third embodiments. The gutter system may include three or more joints.

[0067] In the above embodiment, the gutter system uses the eaves gutter and the vertical gutter to drain outdoor rainwater, but the present invention is not limited to this. A gutter system (rainwater drainage system) may be used that connects a roof drain installed on the roof to a drainage pipe inside a building. This gutter system includes a drain installed on the roof, a roof drain to which rainwater flowing into the drain is guided and in which a siphon generating unit is installed, a first joint connected to the roof drain, a horizontal pipe connected to the downstream side of the first joint, a second joint connected to the downstream side of the horizontal pipe, and a vertical pipe connected to the second joint and arranged inside the building. As in the above embodiment, either one or both of the first joint and the second joint are joints with a cleaning port. [Explanation of symbols]

[0068] 1,1A,1B,1C,2,2A,2B,3,4 Gutter system 10,10A,10B Eaves gutter 15,130 Siphon generating section 30,65,80,95 First joint (joint) 31,81,106 Fitting body 32,66,107 Lid 35 Bent pipe section (connecting pipe) 36,112 Extension tube 36a Cleaning port 41,67,121 Insertion part 42,123 Flange 50, 50A, 50B Call pipe 55,90 Second joint (joint) 60,60A,60B,60C,100 Downpipe 75,105 Fittings 82 Bent pipe section (connecting pipe) 111 Connecting pipe

Claims

1. A rainwater drainage system for draining rainwater from a building, comprising: A drain member provided at an inflow opening through which the rainwater flows in; a joint and a vertical pipe provided downstream of the drain member; Equipped with The joint is A connecting pipe located downstream of the drain member and serving as a flow path for the rainwater; an extension tube protruding outward from the connecting tube; and a cleaning port formed at the end of the extension tube. Storm water drainage system.

2. The drain member has a plurality of vertical ribs arranged in a circumferential direction with respect to the inlet opening. The storm water drainage system of claim 1.

3. a mounting tube that is inserted into the inlet opening to form a drop opening; A flange portion provided at an upper end of the mounting tube; a cover member provided at a position spaced apart above the drop opening; The vertical rib connects the outer periphery of the cover member. The storm water drainage system of claim 2.

4. A first joint and a second joint are provided between the drain member and the vertical pipe, and a horizontal pipe is provided between the first joint and the second joint, The first joint or the second joint is the joint, A siphon generating portion is provided in any one of the first joint, the second joint, the horizontal pipe, and the vertical pipe. The storm water drainage system of claim 1.

5. The connecting pipe is curved. A storm water drainage system according to any one of claims 1 to 4.

6. The connecting pipe is bent. A storm water drainage system according to any one of claims 1 to 4.

7. The joint is formed of a synthetic resin and coated with mortar. A storm water drainage system according to any one of claims 1 to 6.

8. A lid can be attached to the cleaning port. A storm water drainage system according to any one of claims 1 to 7.

9. The lid body has an insertion portion and a flange portion, The insertion portion is inserted into the extension tube through the cleaning port, The flange portion protrudes radially outward from the insertion portion, The outer diameter of the flange portion is equal to or greater than the outer diameter of the extension pipe. The storm water drainage system of claim 8.

10. A building in which a storm water drainage system according to any one of claims 1 to 9 is arranged.

Images